Ichthyological Research最新文献_第3页

A new species of bigeye, Priacanthus gracilis (Perciformes: Priacanthidae), from eastern Australia 来自澳大利亚东部的大眼鲷新物种 Priacanthus gracilis (Perciformes: Priacanthidae)

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-04-22 DOI: 10.1007/s10228-024-00969-x

Shintaro Hashimoto, Hiroyuki Motomura

引用次数: 0

Morphometric and genetic identification of Rhynchoconger ectenurus (Anguilliformes: Congridae) leptocephali with additional information about eel tails Rhynchoconger ectenurus (Anguilliformes: Congridae) 无尾鳗的形态和遗传鉴定以及有关鳗尾的其他信息

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-04-22 DOI: 10.1007/s10228-024-00968-y

Kyohei Sakai, Mari Yoda, Takeshi Sakai, N. Mochioka

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Use of stable isotopes to document lake to stream movements of brook charr Salvelinus fontinalis: a case study from southern Lake Superior 利用稳定同位素记录溪鲑 Salvelinus fontinalis 从湖泊到溪流的移动：苏必利尔湖南部的案例研究

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-04-13 DOI: 10.1007/s10228-024-00961-5

Troy G. Zorn, Brady C. Rudh, Brandon S. Gerig

{"title":"Use of stable isotopes to document lake to stream movements of brook charr Salvelinus fontinalis: a case study from southern Lake Superior","authors":"Troy G. Zorn, Brady C. Rudh, Brandon S. Gerig","doi":"10.1007/s10228-024-00961-5","DOIUrl":"https://doi.org/10.1007/s10228-024-00961-5","url":null,"abstract":"Migrations between spawning, growth and refuge habitats are critical for many fish species. Partially migratory populations of brook charr Salvelinus fontinalis (known as brook trout in the United States), in which a portion of the population migrates, were once widespread in the Great Lakes region of North America, but are now scarce and a rehabilitation priority. Great Lakes fishery managers lack a simple, non-lethal means to determine whether a large brook charr caught in a Great Lakes accessible stream reach represents a stream-resident fish or migrant that previously spent time foraging and growing in Great Lakes waters. We explored a relatively inexpensive and non-lethal stable isotope approach for documenting lake to stream movements of brook charr, using fin clips from brook charr captured in streams in fall prior to spawning. Using fin tissue from juvenile and adult coho salmon captured in Michigan tributaries to Lake Superior, we confirmed distinct stable isotope signatures indicative of prior stream and Lake Superior foraging. We identified brook charr from tributaries accessible to Lake Superior whose stable isotope signatures were similar to those of lake-captured brook charr, lake charr and splake (a brook charr–lake charr hybrid) and distinct from stable isotope signatures of brook charr in streams inaccessible to Lake Superior fishes, suggestive of an adfluvial migratory pattern. Brook charr from two streams had elevated δ15N values, indicative of previous residency in a downstream lake receiving water from a sewage treatment facility. Our findings demonstrate the utility of stable isotope analysis as a non-lethal technique for confirming adfluvial movements of brook charr from Lake Superior to streams.","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction to: ISJ meeting, Fukuoka, 6–9 September 2024 更正为ISJ 会议，福冈，2024 年 9 月 6-9 日

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-04-13 DOI: 10.1007/s10228-024-00972-2

引用次数: 0

The hammerhead shark's cephalofoil reduces fluid moments during turning motion 双髻鲨的头鳍可减少转弯时的流体力矩

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-04-10 DOI: 10.1007/s10228-024-00966-0

Yunosuke Obayashi, Hiroaki Sumikawa, Tasuku Miyoshi

{"title":"The hammerhead shark's cephalofoil reduces fluid moments during turning motion","authors":"Yunosuke Obayashi, Hiroaki Sumikawa, Tasuku Miyoshi","doi":"10.1007/s10228-024-00966-0","DOIUrl":"https://doi.org/10.1007/s10228-024-00966-0","url":null,"abstract":"Mechanical constraints are one factor that shapes organisms' behavior and morphology. Therefore, elucidating these biomechanics is essential for discovering unknown functions of organisms. The cephalofoil of hammerhead sharks (Sphyrnidae) has long been discussed as representative of the organism's unique morphology and function. While the physiological benefits of cephalofoil are becoming clearer, their kinematic function remains to be elucidated in some areas. Scalloped hammerheads (Sphyrna lewini) have been shown to receive significant hydrodynamic drag during straight swimming due to cephalofoil. In contrast, S. lewini is known to exhibit excellent turning ability, but the hydrodynamic effects of the cephalopod foil during turning have not been clarified. This study performed a numerical fluid dynamics analysis on a simplified 3D model of a cephalofoil to simulate its turning and swinging behavior. The results show that the cephalofoil shape reduces the moment from the fluid by reducing the separation of the flow during turning. The study also suggested that having a cephalofoil creates a trade-off between the efficiency of swimming straight and the ability to turn. This study contributes to our understanding of the function of the cephalofoil in hammerhead sharks and to a deeper understanding of their ecology.","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The upper limit of redd abundance compared to the numbers of anadromous adult masu salmon in Horokashubuto Stream, Hokkaido, northern Japan 日本北部北海道 Horokashubuto 溪溯河成体马苏鲑数量与红尾丰度上限的比较

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-04-06 DOI: 10.1007/s10228-024-00970-4

Koh Hasegawa, J. Okado, Yuhei Ogura

引用次数: 0

ISJ meeting, Fukuoka, 6–9 September 2024 国际社会科学理事会会议，福冈，2024 年 9 月 6-9 日

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-03-27 DOI: 10.1007/s10228-024-00967-z

引用次数: 0

An assessment of the potamodromous fish Opsariichthys uncirostris uncirostris (Hasu fish) during its reproductive migration to a Lake Biwa tributary using stable isotope ratios and biometric data 利用稳定同位素比值和生物计量学数据评估琵琶湖支流洄游鱼类 Opsariichthys uncirostris uncirostris（哈苏鱼）的生殖洄游情况

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-03-27 DOI: 10.1007/s10228-024-00965-1

Andrew Mvula, Atsushi Maruyama

{"title":"An assessment of the potamodromous fish Opsariichthys uncirostris uncirostris (Hasu fish) during its reproductive migration to a Lake Biwa tributary using stable isotope ratios and biometric data","authors":"Andrew Mvula, Atsushi Maruyama","doi":"10.1007/s10228-024-00965-1","DOIUrl":"https://doi.org/10.1007/s10228-024-00965-1","url":null,"abstract":"Opsariichthys uncirostris uncirostris (Hasu fish), a vulnerable potamodromous fish, is the only piscivorous cyprinid fish in Japan and endemic as a subspecies to Lake Biwa. The species population is on a continued decline for the past 70 years. This study aimed at developing a portfolio on the species during its reproductive migration to Shiotsuo River, a Lake Biwa tributary, by using a combination of biometric measurements and stable isotope ratios in its tissues. Hasu fish were collected monthly, from May to September 2019, using cast nets. The biometric measurements: wet weight, standard length, gonad weight and gut content were collected and used to calculate the gonado-somatic index (GSI) and Fulton’s condition constant (K) and determine the feeding habits of Hasu fish. Carbon and nitrogen isotope ratios (δ13C and δ15N) in slow-changing muscle and fast-changing mucus tissues of Hasu fish were also used to determine recent diet change. At the beginning of the reproductive season, fewer females than males were caught; however, the number of females increased as the season progressed. On average, males were larger than females. Migrating individuals were healthy (K > 1) and over 37% larger in length than those in the 1960s. Gut content analysis revealed, for the first time, Hasu fish feeding in the rivers, primarily on Ayu fish, during the reproductive migration. δ13C and δ15N in muscle and mucus indicated a recent change in diet, i.e., from Lake Biwa to Shiotsuo River, with differences in the onset of feeding (and consequently upstream migration) between sexes and individuals. For the effective conservation of Hasu fish in the other tributaries where Ayu fish traps block other fishes’ migration, we recommend having the rivers open from June to September to cover its variable timing in the recruitment of reproductive individuals.","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Does predation pressure alter the visual properties of prey? An assessment of the guppy Poecilia reticulata 捕食压力会改变猎物的视觉特性吗？对河豚Poecilia reticulata的评估

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-03-27 DOI: 10.1007/s10228-024-00957-1

Chia-Hao Chang

{"title":"Does predation pressure alter the visual properties of prey? An assessment of the guppy Poecilia reticulata","authors":"Chia-Hao Chang","doi":"10.1007/s10228-024-00957-1","DOIUrl":"https://doi.org/10.1007/s10228-024-00957-1","url":null,"abstract":"Evolution of male-biased coloration in the guppy Poecilia reticulata is driven by sexual and natural selection. The colorful male ornaments are attractive to females, but also attract predators. Distinct predation regimes in Trinidadian streams promote the evolution of different guppy color morphs, with male ornamentation and female mate preference also co-evolving among populations. How attractive a male guppy color morph is to a female depends not only on the coloration itself, but also on how strongly the morph evokes stimulation of the female visual system. Both allele type and gene expression levels of cone opsin genes play a role in female mate preferences. Previous studies have demonstrated that predation can alter female guppy mate choice, but the underlying mechanism remains unclear. Here, I hypothesize that guppies adjust their cone opsin expression profiles in response to predation pressure. Although I detected a significant change in LWS-R transcription in response to predation, cone opsin expression profiles in adult female guppies do not appear to be driven by predation pressure. However, the impacts of predation pressure on developmental plasticity in cone opsin expression and brain anatomy remain promising avenues of further investigation to determine how predators affect female mate preference in guppies.","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nest-use pattern of fluvial goby (Rhinogobius flumineus) in relation to the presence or absence of amphidromous congener: a case study of two rivers in southern central Honshu, Japan 河口鰕虎鱼(Rhinogobius flumineus)的筑巢模式与两栖同类的有无有关：日本本州中南部两条河流的个案研究

IF 1.2 4区生物学

Ichthyological Research Pub Date : 2024-03-20 DOI: 10.1007/s10228-024-00964-2

{"title":"Nest-use pattern of fluvial goby (Rhinogobius flumineus) in relation to the presence or absence of amphidromous congener: a case study of two rivers in southern central Honshu, Japan","authors":"","doi":"10.1007/s10228-024-00964-2","DOIUrl":"https://doi.org/10.1007/s10228-024-00964-2","url":null,"abstract":"<h3>Abstract</h3> Fishes of the genus Rhinogobius (Gobiidae) display paternal care of their nests, constructed beneath stones. Rhinogobius flumineus often coexist with larger Rhinogobius congeners (hence, stronger competitors for the nest site). To understand how R. flumineus reproduce successfully with the presence of a potential nest site competitor, nest-use characteristics of R. flumineus and Rhinogobius nagoyae were investigated in two rivers in southern central Honshu, Japan: one site with both species in sympatry and the other site with R. flumineus in allopatry. Analyses of nest stone, egg clutch, and male body sizes demonstrated that reproductive success, namely the number of eggs deposited, increased with male body size in both species and was positively correlated with nest stone size only in R. nagoyae. The pattern that R. flumineus males are less insistent on using large stones for nesting may partly explain the coexistence mechanism of the two species.","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140200126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0